Confused..

I feel very confused. I am about to be down with school if I can get the creits, and I love what I do most of the time, but lately I've been woundering if I made the right choice... I love doing people's hair and making them feel beautieful and happy, and I'm also really good at what I do. When I told everyone that I wanted to become a hairdresser, they all told me it was going to be hard. Its not that I can't or wont do the work, its just that they wont give me the work todo. And when I do get walk-in's there for nails or something else that I don't need and if I say "No" my teachers would send me home.
     Its just that lately in school I feel like I'm not getting any help from my teachers and YEAH I understand very well that I am now a repeater and I should be bring in my own clienst and all but its not really that easy for me. I feel like they just feed me to the wolves and all they care about is the money they get every month.
     I have watched the other girls pay there way out of school I am not able to do this, I have seen people fake haircuts just to get the creits. I am not that type of person to do that. I feel like this school is killing my spirt and I am afraid that I wont want to do what I onced loved when I get done with school. Everyday I go to school and almost everyday I come home crying because I can't deal with the stress and most days I sit in the back reading a book because I have nothing else better to do.
    Someone once told me that if you are happy doing something then you should fight for that something no matter what comes along and tries to stop you. But my question now is, is it worth all the tears and hours that I've put in if in the end I maybe unhappy with my choice?